Heating furnace and stove



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190,379,999. Pat-999991999211988.'

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No. 379,990. Patented Mar.; 27, 18,89. 'l

MTW-EES E5:

NITED STATES PATENT OFFICE.

GOTILIEB SCHBEYER, OF COLUMBUS, OHIO.

HEATING FU RNACEA'ND STOVE.

SPECIFICATION forming part of Letters Patent No. 379,990, datedy March 27, 1888.

V Application filed November 23, 1886. Serial No. 219,641. (No model.)

To @ZZ whom t may concern:

v Be it known that I, GoT'rLIEB SCHREYER, oi. Columbus, in the county of Franklin and State of Ohio, have invented a new and useful Improvement in Heating Furnaces and Stoves; and I do hereby declare the following to be aJ full, clear, and exact description thereof.

My invention relates to an improvement in stoves and furnaces for heating purposes, and is illustrated in the accompanying drawings, in which- Figure 1 is a vertical section through the middle' of the stove on the line a: x of Fig. 2. Fig. 2 is a side view of the stove. Fig.` 3 is a detached plan view of the part of the stove marked B in Figs. l and 2.

Like symbols of reference indicate like parts in each.

My improved stove consists, necessarily, of two chambers, A and B, each of which may be made in a single piece or in several sections, as is most convenient for construction.' B is the ordinary fire-pot or combustion-chamber for the coal or other fuel, at the base of which chamber are the grate-bars. It is a hollow shell, made preferably of cast-iron, and is oval in cross-section, as shown by the plan view, Fig. 8. At its upper end the chamber B is contracted on opposite sides, so as to leave an intermediate elongated narrow hole, B', for the escape of the products of combustion. As shown in Figs. l and 3, the top of the chamber B is provided with open semi-cylindrical grooves B2, which extend entirely across the stove at the sides of and parallel with the hole B. 'At the outer sides of these grooves are vertical flanges B3, which are provided with shoulders or seats on their inner sides.

The upper part, A, of the stove is a hollow metal shell, which constitutes an auxiliaryl smoke-combustion chamber.

At its base it is .contracted so as to form a narrow opening,

A', which conforms to the corresponding hole, B, of the lower part of the stove, and on each side of the hole A open semi-cylindrical grooves A2 are formed, which are the counter- The ends of the stove-sections, which form the i side walls of the holes A and B', are somewhat shortened, so that when the partA of the stove is s uperposed on the part B these side walls `shall not quite meet, but shall form slots or openings from the passages A2 B2 intothe passage A B.

- C is the stove-pipe, kwhich conveys the products of combustion from the chamber A to the chimney-flue.

' Thebperation is `as follows: The fuel is charged into the lower chamber, B, `of the` stove, and when ignited the smoke and products of combustion risethrough the passage A B in a narrow sheet, and in this place they are met by a current of air, which is drawn through the channels A2 B2 andl through the slots leading therefrom into the passage A B.

The concentration of the smoke'at this meeting-place and the addition of a fresh quantity of air causo the ignition of the unconsumed gases from the ire-pot below, which burn in the chamber A, so that little or. no smoke escapes into the chimney, and by reason of the secondary combustion in the chamber A a maxi mum of heat is obtained from a given quantity of fuel.

I do not claim, broadly, a stove wherein by contraction of its walls the unconsuxned products of combustion are concentrated and are'V thereburned by an added supply of air. Such a device has been in common use, and in this v regard my invention consists invan improved construction of the stove, wherein the air-supply flues A2 B2 are made integral with the stovewalls, and are made the means of supporting ,the upper section of the stove upon thelower section, the passage B being contracted in width, but not in length, and being openatthe ends to take in air, which is supplied to the stove through lateral apertures. The advantages of these features of invention .are that the stove consists of fewer parts and is more IOO stably put together than where the air-fines l a furnace thus constructed. It may be built around with brick-work, as shown in Fig. 2,

, in which case the air-hues A2 B2 are connected with the open air by branch pipes E, which enter these lues at their ends and are made tapering toward them from the outside of the furnace. several pieces, I prefer to make the upper section of the chamber B more oval at the top, where it connects with the chamber A, than at its bottom part, where it connects with the lower section of the chamber B, the latter being less oval in form. So, too, the lower section of the chamber A is made oval at its lower part to connect with the chamber B, but perfectly round at its top part to connect with the top section containing the stove-pipe hole, so that this hole may be turned in any direction to correspond with the flue without altering the position of the furnace. The topmost section is therefore of cylindrical form.

I attach great importance to the connection When the furnace is constructed of of the chambersA and B by the flanges As B. The narrowness of the passage B for the pro- 3o ducts of combustion would be liable to'cause the metal to warp if vthe chambers were rigidly connected. By resting one upon another in the manner above described, room is allowed for expansion and contraction of the metal.

The stove is cheap and durable, and is eiicient and economical for use either with natural gas or coal as fuel. In either case the unconsumed residuum is very small andthe heat units are well utilized. 4o

I claim- A stove having the superposed parts A and B, forming a contracted oblong passage, B', at their junction, and having lateral air-f1uesAl and B2, formed by grooved flanges on said parts tting together and supporting the upper part, said ues communicating laterally with the contracted passage B and being open at the ends, substantially as and for the purposes described.

In testimony whereof Ihave hereunto set my hand this 11th day of November, A. D. 1886.

GOTTLIEB SCHREYER.

Witnesses:

L. E. PUTNAM, D. E. PUTNAM. 

